Zinc alloy



v I UNITEDLSTATES PATENT ori ce.

HANS GQLDSGHMIIDT Ann KARL or ESSEN, GERMANY, assienons, BY EnemaASSIGNMENTS, TO THE CHEMICAL FOUN 'DATION, -INC., A CORPORATION..OFDELA- 1 ZINC ALLOY. 1 e

1,358,147. specifica i t y n Patented Nv.9,192o. No Drawing. Applicationfiled. April 19, 1 917. SerialNo. 163,262. v i

T 0 all whom it may concern. improved. Besides, such castingsare better35 Be it known that we, HANS GOLDSGHMIDT worked than pure alloys of zincand aluand KARL; Mt'iLLER, doctors of chemistry, minum or than pressedzinc. The amount citizens of the German Empire, residing at of aluminumhas an upper limit ,in the for Essen, Province of the Rhine, Germany,mation of the eutectlc mixture which, as

Salkenbergsweg 18, have invented a new above stated is about 5.3% and alower limit 40 and useful Improvement in Zinc Alloys; at about .5 percent, whereas the addition and we do hereby declare the following to ofmanganese may bevaried from about .25 be a full, clear, and exactdescription of the per cent. up to an amount not essentially ex- 0 same.v ceeding 2 per cent.

The object of our invention is an alloy of e The new alloys can be usedas hearing 5 'zinc and aluminum containing manganese. metal and jwhite-metal, furthermore for By'alloying zinc (for which purposecomcasting machine-fittings, for fusees and for mercial speltercontaining lead may be rolled products. 'used) with an amount ofaluminum not con What we claim is:

siderably higher than is necessaryfor form- 1. An .alloy of zinccontaining from about:

ing the eutectic mixture zinc-aluminum, that .5% to about 6% aluminiumand from about is to say 5.3 per cent.. of aluminumg allo s =.25% toabout 2% manganese. r

are'obtained which can be forged and rb'l ed 2. An alloyof zinccontaining from about 2 within certain limits of temperature. How- 5% toabout 6% aluminium and-,from about ever such'binary alloys of zinc andaluto about 2% manganese, the content of minum show the heavy drawbackthat they manganese belng always less than the aludo not'yield soundcastings. ,mm um-content. a

We have found that the tendency. of such 3. A alloy of zlnc contalnmgabout 5% 25' binary alloys .of 'zinc and aluminum for aluminium andabout 2% manganese.

forming blow-holespr-pipes and for segre- In testimony'wliereof, we havesigned our 'g atingis removed by adding. a small amount names'to thisspecification 1n the presence of of manganese. In this way alloys areobo s n mg wltnesses.

tained which .yield denseh and perfectlyl "HANS GOLDSCHMIDT 30homogeneous castings wit a very sma shrinkage", It may be remarked thatby the MULLER addition of manganese the mechanical prop- Witnesses:

erties of these alloys, especially of the 1 FRANCES M.-NUFER,

finished rolled material, are considerably Fimonmcn J. Dm'rzMAN.

